A road is having a horizontal curve of 400 m radius on which

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A road is having a horizontal curve of 400 m radius on which a super-elevation of 0.07 is provided. The coefficient of lateral friction mobilized on the curve when a vehicle is travelling at 100 kmph is

1. 0.07
2. 0.13
3. 0.15
4. 0.4

Correct Option: B

e + ƒ =	V²
	127R

0.07 + ƒ =	100²
	127 × 400

∴ ƒ = 0.13